ARRL

Register Account

Login Help

Search for Amateur Radio News

  • Sunspot070910

    07/10/2010 | The K7RA Solar Update

    The average daily sunspot numbers for this week rose from 11.7 to 16, back to the level from two weeks ago. The geomagnetic indices have quieted down, with average mid-latitude A index dropping over five points from the previous week. Sunspot numbers for
    Learn More

  • Sunspot070110

    07/02/2010 | The K7RA Solar Update

    Most stations reported not-so-great conditions for ARRL Field Day last weekend, but there were sporadic-E openings on 6 and 10 meters. Geomagnetic conditions were a bit rough, with the Planetary A index in double digits for both days, June 26-27. Conditio
    Learn More

  • Sunspot062410

    06/25/2010 | The K7RA Solar Update

    Sunspot numbers were lower for the past week, compared to the previous period. The average daily sunspot numbers fell nearly 11 points to 16.1. Sunspot numbers for June 17-23 were 14, 16, 28, 13, 14, 14 and 14, with a mean of 16.1. The 10.7 cm flux was 70
    Learn More

  • Sunspot061710

    06/18/2010 | The K7RA Solar Update

    The average daily sunspot numbers were up 2.5 points from last week, despite the fact that there were no sunspots at all this week on June 15-16. A new sunspot group 1082 emerged yesterday, June 17, and yielded a daily sunspot number of 14. A nice thing a
    Learn More

  • Sunspot061010

    06/11/2010 | The K7RA Solar Update

    With calmer solar activity, geomagnetic conditions were stable this week. The average daily sunspot numbers were down 7.6 points to 17.7, and the average daily solar flux dropped two points to 71. The average planetary A index declined 6.4 points to 7.9,
    Learn More

  • Sunspot060310

    06/04/2010 | The K7RA Solar Update

    The average daily sunspot numbers were up nine points to 25.3 for this week, compared to the May 20-26 period; the average daily planetary A index rose nearly 10 points to 14.3, and this rise in geomagnetic instability came with the increase in solar acti
    Learn More

  • Sunspot052810

    05/28/2010 | The K7RA Solar Update

    This weekend is the CQ WPX CW Contest and conditions may be a little rough. Our current sunspot group 1072 has reached the Sun’s western horizon and is shrinking, and to top it all off, what looked like a possible emerging spot on Wednesday was not to be.
    Learn More

  • Sunspot052010

    05/21/2010 | The K7RA Solar Update

    Eleven days with no sunspots, but something emerged late Thursday, and it may be the return of old sunspot group 1069. Sunspot group 1069 was visible from May 4-8 before disappearing over the horizon. The return of that sunspot gives a daily sunspot numbe
    Learn More

EXPLORE ARRL

Instragram     Facebook     Twitter     YouTube     LinkedIn